Aroma diffuser



FIG. 1 is a perspective view of an aroma diffuser showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top side view thereof; and,

FIG. 7 is a bottom side view thereof.

The broken lines depict portions of an aroma diffuser in which thedesign is embodied that form no part of the claimed design.

CLAIM The ornamental design for an aroma diffuser, as shown anddescribed.